linux-kernel - Re: [PATCH] null_blk: Fix: memory release when memory

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Date:   Mon, 05 Jun 2023 16:15:53 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     Nitesh Shetty <nj.shetty@...sung.com>
Cc:     gost.dev@...sung.com, Anuj Gupta <anuj20.g@...sung.com>,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] null_blk: Fix: memory release when memory_backed=1


On Mon, 05 Jun 2023 11:53:53 +0530, Nitesh Shetty wrote:
> Memory/pages are not freed, when unloading nullblk driver.
> 
> Steps to reproduce issue
>   1.free -h
>         total        used        free      shared  buff/cache   available
> Mem:    7.8Gi       260Mi       7.1Gi       3.0Mi       395Mi       7.3Gi
> Swap:      0B          0B          0B
>   2.modprobe null_blk memory_backed=1
>   3.dd if=/dev/urandom of=/dev/nullb0 oflag=direct bs=1M count=1000
>   4.modprobe -r null_blk
>   5.free -h
>         total        used        free      shared  buff/cache   available
> Mem:    7.8Gi       1.2Gi       6.1Gi       3.0Mi       398Mi       6.3Gi
> Swap:      0B          0B          0B
> 
> [...]

Applied, thanks!

[1/1] null_blk: Fix: memory release when memory_backed=1
      commit: 8cfb98196cceec35416041c6b91212d2b99392e4

Best regards,
-- 
Jens Axboe